Shock absorber for vehicles



Oct. 27, 1931. G. F. YEVSEYEFF SHOCK ABSORBER FOR VEHICLES Filed May 17, 1928 ATTORNEY.

Patented (lot. 27, 1931 PATENT OFFICE GEORGE F. YEVSEYE F, F,I ETBOIT, MICHIGAN SHOCK ABSORBER roe VEHICLES Application filed May 17, 1828. Serial No. 278,407.

The present invention relates to shock fibsorbers for vehicles and particularly-to the type in which controlled liquid flow is the movement controlling agent.

Among the objects of the invention is .a

shock absorber that shall be easilyand ZeconOmicalIyprOduced and applied and which shall require no adjustment in use.

Another object is a shock absorber that will permit substantially free movement be tween narrow limits but present increasing resistance to movement beyond such Further objects will readily occur to those skilled in the art upon reference to the following description and the accompanying drawings. i Fig. 1 is an elevation of the device with the dust shield removed.

Fig. 2 is a section on line 32-2 of Fig. 1.

Fig. 3 is a section on line 33 of Fig. 2 with a portion of the valve broken away, and

Fig. 4 is an elevation of the mounting means at the lower end.

As indicated in the drawings, the shock absorber. comprises a device to be interposed between an axle and aframe member 11 of a vehicle for the purpose of controlling the spring action. The two ends of the device are preferably secured by means of flanged brackets 12, preferably integral with the adjacent parts of the device, bolted to blocks of fabric material 13 which in turn are bolted to brackets 14 secured to the frame member 11 or axle 10. The bolts securing the respective brackets 12 to the fabric blocks 13 will be spaced so as to permit a small amount of universal movement between the device and the vehicle members.

The device proper comprises two telescoping cups and 21 of which the lower one 20, openin upward, is the larger in diameter and is a plain cylindrical cup with the bracket 12 integral therewith and with a passage 20 through its bottom, which passage will be tapered at its inner end and preferably faced smoothly at its outer end.

' The upper and somewhat smaller cup 21 is provided with an exterior flange 22 at its upper end which flange, on one side, is provided with a depending portion 23 forming an intog-m1 :part of the bracket 12 which is thus spaced :from the cylinder wall.

The cup 21 should be small enough to ,Slide within cup 20 but tight enough to prevent escape of liquid.

, TheCup 20 is provided with an axial tube w25 having a tapered and threaded lower end 26 adapted to fit in the tapered passage 20 above mentioned and be held tightly therein by a screw cap 27. This tube 25 has near its lower end, one or more openings 28 and at its upper :end a wide peripheral flange 29 forming a piston adapted to fit in the upper cup ,21, and it is likewise provided with one or moreopenings 30 under the flange.

The upper cup ,21 also has an axial tube which is screwed into a suitable boss 36 inthe upper closedend of said cup. The tube 35 is also threaded interiorly for the reception of a plug 37. This tube 35 is sQf a suit- 70 able size "to slide within the tube and is provided with oneor more longitudinal openngs 3. which at abou m dlength are of substantial width and with parallel sides but which taper toward both ends, as shown in Fig-2.

Further, the lower end of cup 21 is prorifled with a per orated a d flanged c sure p ate 40, annul r in f rm and adapted to slide on the ou s de of tube 25..

This closure plate 40 is th eaded in o the lower end of the cup 21 and its movement into place limi ed by its flange 41 so as to leave 2.3111 annular osss42 hetweensa d pla e a d a suitable shoulder 48 for the r cepti n of a suitable valve plate or disk 44 also annular and per or ted. The latte disk 44, howe is arranged so ha i s pe fo a ions do not register with the perforations in plate 40 and this arrangement is maintained by means of a pin 45 ifixed in plate 40 but loose in valve 44.

It ,is preferred to secure to the flange 22 on the upper cup 21 a third cup which slides over :cup 20 and prevents deposit of dus -and dir on the ou s de o cup 2 In operation, :the device will be filled wi h asuitableliquidli up to j ust below the piston .or fiange 29. WVl en, through spring action,

the frame 111 approaches the axle 10 the two 1.45 V a "and decreasing in Width toward its ends, a K

cups 20, 21 will be telescoped; When this i o happens,'the bottom and top chambers, a, b

become smaller and the intermediate chamber 0 larger. The liquid L must therefore flow into the intermediate chamber 0 which the end chambers a, b. In such a'case, the] valve a l closes f and the liquid L is forced to passthrough opening-'30 which isinefiect varied in size by the position of opening '38,

a the telescoped condition placing the opening 0 Opposite the upper, narrow end I of opening38z' Resistance to flow of the liquid L out of the I intermediate chamber *0 Will therefore be greatatthe beginning of such extension and lessen as the cups 520, 21 approach their interv mediate or'rest position which is about that" shown inthedrawingsp The action in the opposite directions cause a reverse flow controlled asindicated; Now having described the invention "and low said piston and decreasing in Width toard its ends, and there also being openings near the bottom ofthe secondtube.

- ,3; A shock absorber including telescoping sections, a piston carried by each section and operating in the adjacent section, each section'embodying an outer:chamber and an inner-cha'm-ber, said chambers being in communication with; eachlother and said pistonsQadapted to torceliquid from the inner chamber to the outerlchamberto retard movement ofthe sections With respectto each other. 1 '4. In a shock absorbertor vehicles, an upper sectionandalower section telescopically arranged, each section having an inner liquid chamber and an outer liquid chamber, said chambers being in communication, means inthe 'sectionstor forcing the liquid from the inner chambersto the outer chambers when the sections are moved towards. each "other,-and-1neans torsecurmgtlie shock absorber between itlle chassis and axle of a ,motor vehicles L 3' i a i 'Ashockabsorber for vehicles including telescopingtubular sections, each of said sections carrying a piston, each of said'sections havingan inner chamber :andan outer chamb'erjimeans" for establishing communication between the chambers, and a valve on one pisthe preferred form. of embodiment thereof 'ton'tor. controlling the passage'ot, liquid past it is to be understood that said invention ,is

r to be limited not to'the specific details-herein].

" set forth and illustrated, but 'onlyby the scope of the Claims WhichfolloW. 13A shock absorber compri ingt l s ment: of other. 4 x

the piston having the valve to restrict movethe 'cylinders, vvith respect to each i GEORGE. rfrnvsnrnrr,

ing cups adapted tobe securedrespectively J to two relatively movable members, an 'aXiallyf' located tube'in each cup also adapted to telescope, the outer tube carrying a pisv tonslidable intheinnelr of said, cups and j dividing the space in the ;cups,-sai'd tubes being provided with registering openings, the

opening in said inner ,tubeeXtending for a considerable portion: of thelength thereof in saidtubes.

shock absorber comprising cup memher having avalved' annular-plate secured over itsopen 'e'ndwith' an axial tube secured piston to theother through said openings M tothe other end and extending through'said V it 'fi-r'st cup, and there" being registering openi ingsinsaid'tubesbelovv said piston,"the openv ving in said first tubeextending above and -be- V 5."

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